Connecter for milking machines



Nov. 15, 1932. J. L. HULBERT CONNEC'IER FOR MILKING MACHINES Filed July5, 1928 2 Sheets-Sheet l bill 7770 Arroawtns.

Nov. 15, 1932 8 J. L. LBE T 1,888,040

CONNECTER FOR,MILKING MACHINES Filed July 5, 1928 2 Sheets-Sheet 2F/G.3. I f

Patented Nov. 15, 1932 UNITED STATES PATENT OFFICE JOHN L. HULBERT, FPOUGHKEEPSIE, NEW YORK, ASSIGNOR I'O THE DE .LAVAL SEPARATOR COMPANY, OFNEW YORK, N. Y., A CORPORATION OF NEW JERSEY CONNECTER FOR MILKINGMACHINES Application filed July 5, 1928.

which is in turn connectible with the vacuum chamber of a milkingmachine unit, such vacuum chamber being connectible, through a milktube, with the inner chambers of a set of teat cups. It is also known toconnect the outer or pulsation chambers of the teat cups with apulsation tube, and to provide a primary pneumatic pulsator which willconnect said pulsation tube, either directly or through a secondarypneumatic pulsation, alternately with atmosphere and with said vacuumchamber and thereby transmit pneumatic pulsations to the pulsationchambers of the teat cups. It is also known to operate the primarypulsator by means of an electromagnet and to operate the magnet throughan electric circuit, which is closed through the magnet when the hose isconnected. at one end to the vacuum pipe line and at the other end tothe vacuum chamber of the milking machine unit. Such a pneumatically andelectrically operated milkin machine is setforth in an application fileby C. H. Hapn generator is connected with the vacuum pipe line and theother pole with a terminal adjacent to each cock; one pole of the magnetis connected to the nozzle communicating with the vacuum chamber on themilk p'ail and the other with a terminal adjacent thereto; and the hosecarries two wires which complete the circuit when the hose is connectedat opposite ends to said cock and nozzle: there being means to open andclose the circuit (that is,

0 to produce electric pulsations therein) so as connecter which isapplicable to either end of the hose above described. The invention isalso applicable to any type of milking machine wherein pneumatic andelectric connections are desired to be made between one end 00d December24, 1927, Serial No. 242,328. T said application, one pole of theelectric Serial No. 290,359.

of a hose, tube or pipe having a penumatic chamber or conduit and anelectric terminal. The invention has for its more particular object theprovision of a connecter of this character which will make theconnections positive until intentially broken and which will avoid thepossibility of air leakage.

In the accompanying drawings, which 11- lustrate an embodiment of theinvention:

Fig. l is a side elevation, partly in section, of a complete milkingmachine.

Fig. 2 is a front View of the connecter and a portion of a rubber tubeor hose in operating position.

Fig. 3 is a longitudinal section of the same.

Fig. 4 is a longitudinal sectional view of one of the ferrules that isforced into the end of the rubber tube.

Fig. 5 is a side view of the same.

A pump a is driven by a motor 6 and exhausts air from a vacuum pipe linea to a. vacuum of about 15 inches of mercury. An electric generator (Idriven from the pump has one terminal connected to a wire 0 extendingalong pipe line 0 and the other to a. c0ntact device 7 (also driven frompump a) that intermittently electrically connects it to pipe The milkingmachine unit may be of the type shown in said Hapgood application and inFig. 1 herein. The teat cups 10 are connected through a combinationcluster and secondary pulsator 11, with the milk pail l2 providedwith avacuum chamber 13 and carrying an electrically operable primary pulsator14 for transmitting pneumatic pulsations to the secondary pulsator 11.The a poles of the electro-magnet of the primary pulsator 14 areconnected respectively to a spring 15 similar to spring 7 and to anozzle 16 similar to nozzle At intervals corresponding to the, stanchions, the pipe line is provided with combination cocks and electricconnecters shown in detail in Figs. 2 and 3.

Referring to Figs. 2 and 3 h is a cock body in which a plug 2' isturnable and which may be locked in either position by lugs on thewasher j, which is underpressure from spring is, entering notches in thebody. The lower end of the cock terminates in a tube or nozzle y havinga soft packing ring m around its neck.

Mechanically attached to but electrically insulated from the cock are aspring n and a clamp 0 for securing the wire e to spring n.

v A rubber tube 7) provides pneumatic connection between the cock andthe milking machine itself, as hereinafter described, and has in itswalls two wires q and-1 which transmit electrical impulses. One of thesewires, 9 has it's end attached to a ring 8 around the end of the rubbertube. 'This ring has, at its end farthest from the end of the tube, anin-.

turned edge t that locally restrains the tube to an outside diametersmaller than normal. The other wire 1' has its end attached to a metalliner or ferrule M, which is forced inside the tube, thereby tightlygripping the tube between the ferrule and theinturned .edge It. Thisferrule is provided at one end with a collar '0 and intermediate of itslength has cut in it two longitudinal slits forming a tongue to, whichis bent to form a spring extending nearer than the tube itself to thetubes center. i i

, The end of the spring n is so bent that it presents a sharp cornerrather than a flat face to the ring .9.

While, for simplicity of wording, some of the claims specify a malemember on the'cock and a female member in the flexible tube, I intend toinclude thereby the obvious reversal of parts wherein a cock has atubular extension in which a metallic tube extending from the flexibletube may be inserted. I

Both ends of the flexible tube p may have the same e uipment, so thatthe tube at one end may e pneumatically and electrically connected tothe milking machine unit in the same manner that it is pneumatically andelectrically connected at the other end with the vacuum pipe line 0 andthe circuit from the generator (I as hereinbefore described.

What I claim and desire to protect by Letters Patent is:

1. A combined pneumatic and electric connecter comprising a flexiblehose member, a body having a pneumaticconduit member, a metal liner inone of said members and a shouldered metal tube carried by the othermember and adapted to enter said liner, and a'soft ring adapted tosurround said tube andbe compressed between said shoulder and the end ofthe metallic liner, thereby making an air tight joint. I

2. A combined pneumatic and electric connecter comprising a memberhaving a pneumatic conduit, a tubular extension on said member, aflexible tube, a ferrule in the end of said tube, said tubular extensionadapted to extend into said ferrule, an electric contact ringsurrounding the tube and having an inturned edge adapted to grip thetube between said edge and ferrule and an electric conductor carried bythe tube and in electrical connection with said ring.

3. A combined pneumatic and electric connecter comprising a body havinga pneumatic conduit, a tubular extension on the body communicating withsaid conduit, a flexible hose, a metal liner in said end of the hose andadapted to be slipped over said tubular extension, a ring gripping hehose adjacent its said end, two wires embedded in the hose and inelectrical contact with said ring and liner respectively, an electricconductor carried by and insulated from said body and electricallycontacting with said ring when the hose is attached to said body, saidhose and liner adapted to enclose the major part of the length of saidtubular extension when said parts are cohnected, and means providing anair-tight joint between said liner and said body. i

4. A combined pneumatic and electric connecter comprising a flexiblehose, abody having a pneumatic conduit, a metal liner memher in thehose, a shouldered metal [tubular 'gmembercarried by said body," a softring adapted to surround said tubular member and be compressed betweensaid shoulder and the end of the metal liner member, thereby making anair-tight joint, an electrical conductor in electrical connection withsaid metal liner member, one of said metallic members having a portionso bent as to press iagainst the other tp form an electric conact. I

5. A combined pneumatic and electric conncter comprising a. shoulderedbody havin a pneumatic conduit; a tubular extension from said body, apacking ring surrounding the tubular extenslon adjacent the shoulder, abent spring mechanically attached to but insulated from said body, aflexible tube, a i ferrule inside the end of the tube adapted to slideover said extension against said packing ring, a metallic rinsurrounding the end of the tube and ma ing contact with said spring, andwires embedded in the tube wall, one wire being electrically connectedto said ferrule and the other to said ring.

6. A combined pneumatic and electric connecter comprising a shoulderedbody having a pneumatic conduit, a tubular extension from said body, apacking ring surrounding the tubular extension adjacent the shoulder,abent spring mechanically attached to but insulated from said body, aflexible tube, a ferrule inside the'end of the tube adapted to slideover said extension against said packing ring, a metallic ringsurrounding the end of the tube and making contact with said spring, andwires embedded in the tube wall, one wire being electrically connectedto said ferrule and the other to said ring, said spring being so bent asto present a sharp corner to said'metallic ring.

7. A combined pneumaticand electric coni 1,eaa,oeo

to said ferrule and the other to said ring,

and a tongue on said ferrule which is bent to make electrical contactwith said tubular extension.

In testimony of which invention, I have hereunto set In hand at Pouhkeepsie, New

York, on this t irtieth day 0 June, 1928.

JOHN L. HULBERT.

